Scaffold-bracket.



G.C;REEDER, SOAIFOLD BRACKET.

AFPLIUATION FILED rnn.a,191m

968,417. Patented Aug. 23, 1910.

will

mmm:

nl: Nokms Psrsks ca.. wAsHmcaN. n. c.

CHARLES C. REEDER, OF LINCOLN, ILLINOIS.

SCAFFOLD-BRACKET.

Speccaton of Letters Patent.

Patented Aug. 23, 1910.

Application led February 8, 1910. Serial No. 542,660.

To all whom it may concern:

Be it known that I, CHARLES C. REEDER, a citizen of the United States, and a resident of Lincoln, in the county of Logan and State of Illinois, have made certain new and useful Improvements in Scaii'old-Brackets, of which the following is a specication.

My invention is an improvement in scaffold brackets,.and consists in certain novel constructions, and combinations of parts, hereinafter described and claimed.

The object of the invention is to provide a device of the character specified, which may be securely clamped on supports of varying thickness, and in which the scaifold supporting arm will be held at all times in horizontal position.

Referring to the drawings forming apart hereof, Figure 1 is a perspective view of the bracket in place, Fig. 2 is a top plan view of the bracket, Fig. 3 is a section on the line 3 3 of Fig. 2, and Fig. 4`is a detail perspective view of the supporting arm.

The embodiment of the invention shown in the drawings is composed of similar sections, each composed of a block 1, having one end rounded as at 2, and having the other provided with spaced ears 3 extending laterally in one direction, and with a lug 4 extending laterally in the opposite direction, the lug having its outer face provided with transverse grooves or corrugated as at 5.

The ears of one of the sections is received between the ears of the other section, and each of the ears isV provided with a perforation, the perforations registering, and a pin 6 is passed through the perforations. The pin is provided with a head 7, and a shoulder 8 is formed between the head and the pin proper, for limiting the downward movement of the pin. The sections are thus hinged together', and by removing the pin they may be separated from each other. A clamping jaw 9 is connected with each section, each jaw consisting of two portions 10 and 10il arranged at substantially a right angle to each other. The outer end o f the portion 10 is provided at each side with a sharpened transverse rib 11, and the outer face of the portion 1()a is grooved or corrugated as at 12.

The clamping jaws are arranged with the Vcorrugated face of the portion 10a in contact with the corrugated face of the lug 4,

and a bolt 13 passes through the portion and the lug, and is engaged by a nut 14 to secure the parts together. It will be evident that when the blocks 1 are swung outwardly from each other, the gripping portions 10 of the clamping jaws will be joined together, and mechanism is provided for swinging the sections toward and from each other. The said mechanism consists of an elbow lever having a straight arm 15, and a curved arm 16, and at the angle of the lever or junction of the arms, a rounded heel 17 extends outwardly, and is provided with a transverse opening 18, reamed out at both ends as shown. The free end of the curved arm 16 is provided with a cross head 19, and near the junction of the arms, the straight arm is provided with oppositely extending lugs or cams 20, the upper face of the lugs being flush with the upper face of the arm, and the outer face 21 inclining inwardly and downwardly. The arm is also reduced beyond the lugs, and a shoulder 22 is formed on each side of the arm at the junction of the reduced portion with the main portion. The elbow lever is pivoted on the pin 6, the said pin passing thro-ugh the lug 17, which encircles the pin between the ears 3. Each of the blocks 1 is provided on .its inner'face with a transverse arc shaped groove 23, the said grooves being of greatest depth at their upper ends, and gradually decreasing in depth toward their lower ends. The grooves are in position for engagement by the lugs 20, and it will be evident that when the elbow lever is swung downward and the lugs enter the grooves, the blocks will be moved apart.

In operation the elbow lever is swung upward, and the gripping portion 10 of the clamping jaws are arranged on each side of a vertical beam or Stringer 24, in the position shown in Figs. 1 and 3, and at the height at which it is desired to support the scaffold. The lever 15-16 is now swung downward into a substantially horizontal position thus clamping the jaws firmly on the Stringer. The downward movement of the elbow lever or rather of the arm 15, is limited by the engagement of the cross-head 19, on the arm 16, with the edge of the Stringer, and the parts are so proportioned, that when the cross head is in engagement with the edge of Stringer, the arm 15 will be in horizontal position. The section may be adjusted for stringers of various thickness, by loosening the nuts 1-1, and moving the angle plates 9 toward or from each other, the portions 10a being slotted to permit this adjustment. The angle plates should be adjusted at such distance, that when the sections are clamped on the Stringer, the arm 15 will be hori- Zontal.

It will be understood that two or more of the brackets are used, being arranged at spaced distances, and that a board 25 is laid from one to the other, resting on the arm 15. The device may be arranged with the angle plates 9 in reversed position, if desired, that is, with the portions 10 of the angle plates outward instead of inward. This arrangement would be used for grasping very thick stringers.

It will be evident that the device consists of two blocks hinged together at one end in spaced relation, each being provided with a gripping jaw at the hinged end which 1s adjustable transversely of the block toward and from the jaw on the other block, and a lever hinged between the blocks, and having means for pressing said blocks apart to grip the jaws on the support, and also having means for engaging the support to hold the lever perpendicular thereto.

I claim- 1. A device of the character specified, comprising a pair of blocks, each having at one end a pair of spaced ears extending laterally in one direction, and a lug having its outer face serrated, extending in the opposite direction, the ears of one block being received between the ears of the other block, a pin passing the ears and hinging the blocks togetlfer, an elbow lever having at the junction of its arms a lateral lug having an opening for receiving the pin, said lever being arranged between the blocks, with the lug between the ears, the lower arm of the elbow lever having at its free end a cross head, and the upper arm oppositely extending lugs, the outer face of each lug being beveled downwardly, each of the blocks having an arc-shaped groove in which the adjacent lug moves, an angle plate connected with the lateral lug of each block, each of said plates having one of its arms arranged alongside the lug, and the other in substantial parallelism with the corresponding arm of the other plate, each of said arms having transverse ribs on its faces, and a bolt passing through the other arm and the lateral lug, said arm having a slot through which the bolt passes.

2. A device of the character specified, comprising a pair of blocks, eac-h having at one end a pair of spaced ears extending laterally in one direction, and a lug having its outer face serrated, extending in the opposite direction, the ears of one block being received between the ears of the other block, a pin traversing the ears and hinging the blocks together, an elbow lever having at the junction of its arms a lateral lug having an opening for receiving the pin, said lever being arranged between the blocks, with the lug between the ears, the lower arm of the elbow lever having at its free end a cross head, and the upper arm oppositely extending lugs, the outer face of each lug being beveled downwardly, each of the blocks having an arc-shaped groove in which the adjacent lug moves, and an angle plate connected with the lateral lug of each block, and adjustable transversely of the block. v

3. A scaffold bracket comprising a pair of blocks hinged together at one end and each having an outwardly extending lug at the said end, an angle plate adjustably mounted on each lug, one of the arms thereof abutting the outer face of the lug, said arm and lug being serrated on the abutting faces, and the arm being slotted longitudinally, the other arm of said angle plate having transverse ribs on each of its faces, and an elbow lever pivoted between the blocks, and having on its upper arm cam faces for engaging the blocks to force them apart, the lower arm having a cross head and being of such length that when the cross head is flush with the hinged ends of the blocks the other arm will be in alinement with the blocks.

4. A scaffold bracket, comprising a pair of blocks hinged together at one end, and provided at the said end with a lateral lug, a pair of angle plates each having one of its arms abutting against the lug, and the other provided on both faceswith transverse ribs for engaging and gripping a support, means for securing the plate to the lug to permit it to be adjusted transversely of the block, and a lever pivoted between the blocks and having means for forcing them apart, said lever having means for engaging the sup port when the bracket is in place to retain said lever in alinement with the blocks.

5. A scaffold bracket comprising a pair of blocks hinged together at one end in spaced relation, a clamping jaw for engaging a support secured to each block at its hinged end and adjustable transversely of the block toward and from the aw on the other block, and an elbow lever hinged by its apex between the blocks and having on one arm means for forcing said blocks apart, the other arm having means for engaging the supports to limit the downward movement of the lever and retain the first mentioned arm in alinement with the blocks.

6. A scaffold bracket, comprising a pair of blocks hinged together at one end, a clamping jaw for engaging a support connected with each block at the hinged end and ad justable transversely thereof, and a lever hinged between the blocks and having means for pressing them apart, when moved in one direction, and means for engaging the support to limit the swinging movement of the bar in such direction.

7. A scail'old bracket comprising a pair of blocks hinged at one end and each having at the said end a gripping jaw for engaging the side of a vertical support, and a lever pivoted between the blocks and having means for pressing the blocks apart to cause the gripping jaws to clamp the sup ort, said lever having a lateral extension or engaging the support below the blocks, to retain said lever erpendicular to the support.

8. A scaold bracket comprising a pair of gripping jaws for grasping the sides of a vertical support each of said jaws comprising a block having at one end a lateral lug, an angle plate having one arm provided with a roughened face, and the other connected with the lug and reversible and adjustable longitudinally thereof, and means for operating the blocks to cause the jaws to grasp the support.

9. A scaiiold bracket comprising a pair of gripping jaws for grasping the sides of a vertical support, said jaws being hinged together, and a lever for operating the jaws, said lever being provided with means for engaging the support to hold the said lever in perpendicular relation to the support.

l0. A scaffold bracket comprising a pair of blocks hinged together at one end and having at the said end a lateral outwardly projecting lug, a gripping jaw adjustably mounted on each lug for moving toward and from the jaw on the other lug, and a supporting arm for the scaffold provided with means tor moving the sections laterally to clamp 4o the jaw on a support.

CHARLES C. REEDER.

Witnesses:

BEN MYERS, CHARLES R. CORWINE. 

